detect role chain loops

[synfinatic]

Fixes: #194

[codecov]

Codecov Report

Merging #203 (e475bfe) into main (0ecd005) will decrease coverage by 0.15%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #203      +/-   ##
==========================================
- Coverage   41.34%   41.18%   -0.16%     
==========================================
  Files          10       10              
  Lines        1611     1617       +6     
==========================================
  Hits          666      666              
- Misses        889      895       +6     
  Partials       56       56              

Impacted Files	Coverage Δ
sso/awssso.go	0.00% <0.00%> (ø)

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